A tool used by the artificial intelligence company Anthropic pretended to be a human being to try to gain access to a database. During routine AI safety testing carried out by the U.K.’s AI Security Institute, one of Anthropic’s AI agents, Mythos 5, created fake online profiles to try to trick someone into inserting malicious code into GitHub, a prominent open-source project where technology developers store software code. While the attempt to insert malicious code into GitHub was unsuccessful, the institute warned that this was the first time it had witnessed an AI model carry out such levels of “autonomy and deception” on its own accord. Anthropic said the AISI testing parameters were “not representative of any of our production models.” The AI company added it will be launching an investigation into the incident to “identify the causes of its behavior.”